Roundup

The best grammar checkers for students

Grammarly is still the best at this. Here is when the free built-in checker is genuinely enough, and when it is not.

Write It teamUpdated August 2, 20262 min read

Grammar checkers all catch the same 80%. The difference is what they do about the other 20% — the awkward-but-technically-correct sentence, the paragraph that repeats itself, the tone that is wrong for the assignment.

1. Grammarly

The most mature engine in the category. It catches subtler problems than the alternatives, explains why something is wrong rather than just flagging it, and handles tone and formality with real nuance. It runs in the browser, in desktop apps, and as a mobile keyboard, which nothing else here does.

If proofreading is the specific thing you struggle with and you write in a lot of different places, this is the answer.

2. Write It Writing Assistant

Covers spelling, grammar, punctuation, clarity, conciseness, tone, repetition, word choice, passive voice, readability, and sentence variety, with underlines in Google Docs as you write. There is also inline tab completion that suggests the next phrase.

It is not as deep as Grammarly on pure grammar and we would not claim otherwise. Its argument is that it comes attached to the drafting, humanizing, research, and citation tools, so proofreading is one part of one extension rather than a separate subscription.

3. QuillBot Grammar Checker

A capable free checker that comes with the paraphraser, summarizer, and citation generator. Good value if you are already using QuillBot for rewriting.

4. Google Docs built-in

Free, already running, and better than it used to be. It catches spelling and obvious grammar errors and offers basic suggestions. It will not tell you a paragraph is repetitive or that your tone is too casual for the assignment.

What grammar checkers will not fix

Worth being blunt: most essays lose points on argument and structure, not mechanics. A thesis that does not commit to anything, body paragraphs that summarize instead of arguing, evidence that sits there without analysis — no checker flags any of it.

If your feedback keeps saying "needs stronger analysis" rather than "watch your commas", a grammar checker is not the purchase that fixes it.

Get proofreading plus everything after it

Install Write It for grammar, clarity, and tone checks alongside drafting, research, and citations.

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Frequently asked questions

What is the best free grammar checker for students?

Google Docs’ built-in checker costs nothing and is already on. QuillBot and Write It both have free tiers that go further, catching clarity and tone problems the built-in checker misses.

Is Grammarly Premium worth it for a student?

If proofreading is genuinely your weak point and you write across many apps, it is the strongest option. If your feedback is about argument and structure rather than mechanics, the money is better spent elsewhere.

How much does Write It cost?

Write It is free to start with 5,000 tokens at signup. Plus is $10 a month or $96 a year and includes 100,000 tokens a month. Premium is $15 a month or $144 a year and includes 200,000 tokens a month. Unused tokens roll over on both paid plans.

Does Write It work outside Google Docs?

Write It runs in Google Docs with the full toolkit, in Microsoft Word on the web, and in Google Slides with a lighter feature set.